diff options
Diffstat (limited to 'contrib/btree_gist/btree_float4.c')
| -rw-r--r-- | contrib/btree_gist/btree_float4.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_float4.c b/contrib/btree_gist/btree_float4.c new file mode 100644 index 0000000..3cbd9a0 --- /dev/null +++ b/contrib/btree_gist/btree_float4.c @@ -0,0 +1,212 @@ +/* + * contrib/btree_gist/btree_float4.c + */ +#include "postgres.h" + +#include "btree_gist.h" +#include "btree_utils_num.h" +#include "utils/float.h" + +typedef struct float4key +{ + float4 lower; + float4 upper; +} float4KEY; + +/* +** float4 ops +*/ +PG_FUNCTION_INFO_V1(gbt_float4_compress); +PG_FUNCTION_INFO_V1(gbt_float4_fetch); +PG_FUNCTION_INFO_V1(gbt_float4_union); +PG_FUNCTION_INFO_V1(gbt_float4_picksplit); +PG_FUNCTION_INFO_V1(gbt_float4_consistent); +PG_FUNCTION_INFO_V1(gbt_float4_distance); +PG_FUNCTION_INFO_V1(gbt_float4_penalty); +PG_FUNCTION_INFO_V1(gbt_float4_same); + +static bool +gbt_float4gt(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const float4 *) a) > *((const float4 *) b)); +} +static bool +gbt_float4ge(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const float4 *) a) >= *((const float4 *) b)); +} +static bool +gbt_float4eq(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const float4 *) a) == *((const float4 *) b)); +} +static bool +gbt_float4le(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const float4 *) a) <= *((const float4 *) b)); +} +static bool +gbt_float4lt(const void *a, const void *b, FmgrInfo *flinfo) +{ + return (*((const float4 *) a) < *((const float4 *) b)); +} + +static int +gbt_float4key_cmp(const void *a, const void *b, FmgrInfo *flinfo) +{ + float4KEY *ia = (float4KEY *) (((const Nsrt *) a)->t); + float4KEY *ib = (float4KEY *) (((const Nsrt *) b)->t); + + if (ia->lower == ib->lower) + { + if (ia->upper == ib->upper) + return 0; + + return (ia->upper > ib->upper) ? 1 : -1; + } + + return (ia->lower > ib->lower) ? 1 : -1; +} + +static float8 +gbt_float4_dist(const void *a, const void *b, FmgrInfo *flinfo) +{ + return GET_FLOAT_DISTANCE(float4, a, b); +} + + +static const gbtree_ninfo tinfo = +{ + gbt_t_float4, + sizeof(float4), + 8, /* sizeof(gbtreekey8) */ + gbt_float4gt, + gbt_float4ge, + gbt_float4eq, + gbt_float4le, + gbt_float4lt, + gbt_float4key_cmp, + gbt_float4_dist +}; + + +PG_FUNCTION_INFO_V1(float4_dist); +Datum +float4_dist(PG_FUNCTION_ARGS) +{ + float4 a = PG_GETARG_FLOAT4(0); + float4 b = PG_GETARG_FLOAT4(1); + float4 r; + + r = a - b; + if (unlikely(isinf(r)) && !isinf(a) && !isinf(b)) + float_overflow_error(); + + PG_RETURN_FLOAT4(Abs(r)); +} + + +/************************************************** + * float4 ops + **************************************************/ + + +Datum +gbt_float4_compress(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + + PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo)); +} + +Datum +gbt_float4_fetch(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + + PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo)); +} + +Datum +gbt_float4_consistent(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + float4 query = PG_GETARG_FLOAT4(1); + StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2); + + /* Oid subtype = PG_GETARG_OID(3); */ + bool *recheck = (bool *) PG_GETARG_POINTER(4); + float4KEY *kkk = (float4KEY *) DatumGetPointer(entry->key); + GBT_NUMKEY_R key; + + /* All cases served by this function are exact */ + *recheck = false; + + key.lower = (GBT_NUMKEY *) &kkk->lower; + key.upper = (GBT_NUMKEY *) &kkk->upper; + + PG_RETURN_BOOL(gbt_num_consistent(&key, (void *) &query, &strategy, + GIST_LEAF(entry), &tinfo, + fcinfo->flinfo)); +} + + +Datum +gbt_float4_distance(PG_FUNCTION_ARGS) +{ + GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0); + float4 query = PG_GETARG_FLOAT4(1); + + /* Oid subtype = PG_GETARG_OID(3); */ + float4KEY *kkk = (float4KEY *) DatumGetPointer(entry->key); + GBT_NUMKEY_R key; + + key.lower = (GBT_NUMKEY *) &kkk->lower; + key.upper = (GBT_NUMKEY *) &kkk->upper; + + PG_RETURN_FLOAT8(gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry), + &tinfo, fcinfo->flinfo)); +} + + +Datum +gbt_float4_union(PG_FUNCTION_ARGS) +{ + GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0); + void *out = palloc(sizeof(float4KEY)); + + *(int *) PG_GETARG_POINTER(1) = sizeof(float4KEY); + PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo)); +} + + +Datum +gbt_float4_penalty(PG_FUNCTION_ARGS) +{ + float4KEY *origentry = (float4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key); + float4KEY *newentry = (float4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key); + float *result = (float *) PG_GETARG_POINTER(2); + + penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper); + + PG_RETURN_POINTER(result); +} + +Datum +gbt_float4_picksplit(PG_FUNCTION_ARGS) +{ + PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0), + (GIST_SPLITVEC *) PG_GETARG_POINTER(1), + &tinfo, fcinfo->flinfo)); +} + +Datum +gbt_float4_same(PG_FUNCTION_ARGS) +{ + float4KEY *b1 = (float4KEY *) PG_GETARG_POINTER(0); + float4KEY *b2 = (float4KEY *) PG_GETARG_POINTER(1); + bool *result = (bool *) PG_GETARG_POINTER(2); + + *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo); + PG_RETURN_POINTER(result); +} |